 |
|
 |
 |
Radio Network Management
- Solutions
- Improve and manage the performance of voting networks
- Change channel on a remote radio using DTMF
- Monitor the status and performance of radio sites
Improve and manage the performance of voting networks
The 619SRI provides the ability to remotely tune parameters at repeater sites. This is especially useful in voting networks where optimum performance must be maintained.
The example above shows a voting system with a number of repeater sites controlled by 619SRI’s. Through PC software, audio levels and PTT key-up times can be re-configured at selected devices. Line input and output levels of each port of the 619SRI can be adjusted by around ±17dB, using digital pots. Adjustments can be made remotely over either a dedicated RS-232 link or a multi-drop RS485. Alternatively, adjustments can also be made over the radio network by using a V.23 modem adaptor.
Change channel on a remote radio using DTMF
The 970DD provides the ability to perform channel change on a radio through a DTMF command. The DTMF command is used to control the 970DD’s digital output port. This in turn controls the channel change port of the radio.
DTMF commands can be sent from either Omnitronics consoles, radios fitted with DTMF keypads or dispatch systems. The output port can be configured to provide either a HEX or BCD code.
The diagrams above show how channel change can be performed using the 970DD Channel Change decoder and the Omnitronics 960CSD console with a local and a remote radio configuration.
Monitor the status and performance of radio sites
Omnitronics Site Monitor Series II assists communication network owners and operators in detecting and preventing failures before they happen. Site Monitor is ideal for service critical communications networks and provides remote control, monitoring and performance trending of remote site equipment.
Omnitronics Site Monitor is a telemetry based system that is controlled by a Citect SCADA application. The SCADA software provides the alarm and trending interface for the operator. A Master RTU is responsible for controlling communications to multiple sites. At each site, a Slave RTU interfaces to the radio equipment, using analog or digital inputs, to acquire information such as power levels, RSSI and temperature.
The Site Monitor system works on an exception reporting basis from the Slave RTU’s, with periodic polling by the Master RTU. When critical events occur at a site, messages are reported back to the Master RTU and the SCADA software. Alarms remain visible on the screen until acknowledged by the operator.
Site Monitor is also available in a GSM/CDMA version where all communications between the Master RTU and the Slaves takes place using GSM or CDMA modems.